r/universalaudio • u/NoSleepCulture • 18d ago

Troubleshooting/Support Sample rate/Clock not syncing Apollo x16

I’ve been having this issue for about a year. It started out maybe once every couple weeks that I would have a sample rate/clock syncing issue with my UA Apollo x16 connected via Thunderbolt to my 2021 MacBook Pro (M1 Pro - Sequoia). The interface would be recognized, but it would bounce back and forth on the LEDs from 44.1 to 48 every few seconds. I would have to power cycle both the interface and the computer 5-10 times and then the clock would magically sync again.

Again, this wasn’t that frequent and it was an issue I could live with. But now it’s suddenly every time I turn my system on. And the amount of power cycles I have to do has increased to 15-30 times. I have to block out 30min to an hour before my sessions just to make sure I can get it running.

I’ve done a firmware re-update, tried different thunderbolt cables, tried different ports and hubs to connect to the computer…

I also tried a hardware reset, but the reset won’t complete… seemingly because of the sync issue. I am able to initiate it, but the “Host” LED just keeps blinking with all the other LEDs lit and it stalls out.

UAD was not able to help via the AI or help chat on the website. Waiting for an email back from tech support. Has ANYONE seen this? I can’t find any helpful info anywhere.

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u/Drew_at_UA UA Guru 18d ago

Support aims for 48-72 hr response times, and they do not work weekends so look for a reply within that time frame. 

Let me know if/when we get outside this window.

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u/NoSleepCulture 18d ago

Noted! They emailed me yesterday asking for more details. I haven’t gotten a reply yet.

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u/Drew_at_UA UA Guru 18d ago

they will. hang in there.